Washington companies raised more venture capital funding in the first quarter than they have during the first three months of any year in more than a decade, building on momentum the industry mustered up late last year.

During the first quarter, 38 Washington companies hauled in roughly $329.9 million from venture capitalists, a 55 percent increase over the $212.5 million raised by firms in the region during the same period last year, according to the latest round of data from PricewaterhouseCoopers and the Nationa...